68081515893 has 12 divisors (see below), whose sum is σ = 98348778528. Its totient is φ = 45383610600.

The previous prime is 68081515837. The next prime is 68081515919. The reversal of 68081515893 is 39851518086.

68081515893 is a `hidden beast` number, since 6 + 8 + 0 + 8 + 1 + 51 + 589 + 3 = 666.

It is not a de Polignac number, because 68081515893 - 2⁸ = 68081515637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68088515893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231055 + ... + 435372.

It is an arithmetic number, because the mean of its divisors is an integer number (8195731544).

Almost surely, 2^68081515893 is an apocalyptic number.

It is an amenable number.

68081515893 is a deficient number, since it is larger than the sum of its proper divisors (30267262635).

68081515893 is a wasteful number, since it uses less digits than its factorization.

68081515893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 677784 (or 677781 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The spelling of 68081515893 in words is "sixty-eight billion, eighty-one million, five hundred fifteen thousand, eight hundred ninety-three".